Pressure sensitive adhesive properties of acrylic quarternary copolymers and their blends with poly(vinyl chloride-co-vinyl acetate)

Quaternary polymers(PEBEVs) of 2-ethylhexyl acrylate(2-EHA), n-butylacrylate (BA) and ethyl acrylate (EA), vinyl acetate (VAc) were synthesized. The blend of PEBEVs and poly(vinyI chloride-co-vinyl acetate) (PVCVAc) were prepared by solution blending. Pressure sensitive adhesion properties of acrylic solution type quaternary polymers and their blends with PVCVAc were investigated Glass transition temperature(ir,) of PEBEVs decreased with increasing the contents of main monomer(2-EHA and BA). In adhesive properties of PEBEVs, tackiness increased and holding power decreased with increasing the contents of main monomer. On the other hands, peel strength increased with increasing the contents of main monomer up to 15 wt% and then decreased at further higher contents of main monomer. Tackiness of blends decreased with increasing the contents of PVCVAc. Holding power and peel strength increased with increasing the contents of PVCVAc up to 15wt% and 5 wt%, respectively and then gradually decreased at further higher contents of PVCVAc In peel test, interfacial failure was occured in each blends.